Simple Machine Group 2

6/10/11

Catapults and Trebuchets

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What is a catapult?

A catapult is a device used to hurl a projectile a very far distance. It was invented by the ancient Greeks.

What type of simple machine is it?

It is a lever and a pulley, and a wheel and axle.

What is a trebuchet?

A trebuchet is a type of catapult that uses counterbalance weights to throw the projectile, which is contained in a leather pouch.

What type of simple machine is it?

It is a lever and a pulley, but it also has a wheel and axle.